
main{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center; /* 使文本居中 */
    margin-top: 200px;
    gap: 1px;
}
.content{
    margin: 0; /* 清除外边距 */
    padding: 0; /* 清除内边距 */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center; /* 使文本居中 */
    margin: 0px;
}
.content h1,
.content h2 {
    margin:5px; /* 清除标题的上下外边距 */
}

footer {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    text-align: center; /* 使文本居中 */
    height: 100%;
    margin-bottom: auto;
}
.bk{
    margin-top: 10px;
    display: flex;
    gap: 20px;
}
.bk a{
    text-decoration: none;
}
.bk a:hover{
    color: #1565c0;
    text-decoration: none;
}
.bk img{
    width: 40px;
    height: 40px;
}



